Chemistry – Mar 5, 2019 Agenda Homework review p2 top and p3 Get out Driving Forces 1 For a HMK Check of p2 And p3 driving forces P3 Challenge –nomenclature quiz G or K Objective – Driving forces continued Assignment: Driving Forces Worksheet 2 Agenda Homework review p2 top and p3 Bit More on Electron Transfer Net ionic eqns on WB Xtra practice on ID Driving forces

4) Transfer of electrons: Oxidation-Reduction How to identify a redox reaction Is there an atom that is an element on one side and in a compound on the other side? (often Single Replacement reactions) Is there an element that has a different charge ion on both sides? (Many synthesis and decomposition reactions.) Transfer of electrons is a driving force. Elements are driven to complete octets. Note: All combustion reactions are driven by electron transfer.

Activity Series For single replacement reactions, the determining factor is the place of the two metals in the activity series. In general, a metal can displace any of the metals which are lower in the activity series: Ex: Cu + AgNO3  Cu(NO3)2 + Ag Ex: Cu + Fe(NO3)3  Cu (NO3)2 + Fe Ex: Zn + Fe(NO3)3  Zn (NO3)2 + Fe

Reactivity Series for Halogens In general, a halogen can displace any of the halogens which are lower in the activity series for halogens. Notice that the activity series of halogens is just their order within the periodic table. Ex: F2 + 2 NaBr  2 NaF + Br2 Ex: Br2 + 2 NaCl  2 NaBr + Cl2

Net ionic Equations on WBs In groups of 3 or 4, put three homework problems on a large portable white board. Get approval from teacher then put three more on. Each problem should be written in a different hand. Boards under my desk, markers in box and Sock erasers in cardboard box in front. # 1, #2 and #3. #5, #6 and #13 #14, #15, and #16

Practice ID driving forces Balance, ID type, ID driving force _____1. _____H3PO3  _____H3PO4 + _____PH3 _____2. _____Fe2O3 + _____C  _____CO + _____Fe _____3. _____FeS + _____O2  _____Fe2O3 + _____SO2 _____4. _____NH3 + _____O2  _____NO + _____H2O _____5 ._____Si + _____S8  _____Si2S4

More Practice ID driving forces _____6. _____Hg2CO3  _____Hg + _____HgO + _____CO2 _____7. _____SiC + _____Cl2  _____SiCl4 + _____C _____8. _____Al4C3 + _____H2O  _____CH4 + _____Al(OH)3 _____9. _____V2O5 + _____HCl  _____VOCl3 + _____H2O _____10. _____Ag2S + _____KCN  _____KAg(CN)2 + _____K2S

Exit Slip - Homework What’s Next? (How to prepare for the next day) Exit Slip: When the sulfuric acid in acid rain reacts with the calcium carbonate of marble statues, the reaction transforms the marble into calcium sulfate which crumbles away and also produces some water and carbon dioxide. 1) Convert to an equation including state descriptors. 2) Balance. 3) Identify the type classification. 4) Identify any driving forces. What’s Due? (Pending assignments to complete.) Driving Forces Worksheet 2 What’s Next? (How to prepare for the next day) Read p473, p286-288, p548-549, p280-282